Sökning: "High-temperature"

Visar resultat 6 - 10 av 995 avhandlingar innehållade ordet High-temperature.

  1. 6. High temperature corrosion during waste incineration : characterisation, causes and prevention of chlorine-induced corrosion

    Författare :Peter Viklund; Christofer Leygraf; Jan Froitzheim; Staffan Hertzman; Sweden Stockholm Swerea KIMAB AB; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high temperature corrosion; waste incineration; superheater tubing; steel; alkali; chlorine; suphur; Chemistry; Kemi;

    Sammanfattning : Waste-fired boilers suffer severely from corrosion of critical components such as superheater tubes. In this work the high temperature corrosion of candidate superheater alloys have been investigated by detailed laboratory studies and controlled field exposures in full-scale boilers. LÄS MER

  3. 7. Phase transitions in high-temperature superconductors

    Författare :Jack Lidmar; KTH; []
    Nyckelord :Superconductivity; Vortices; Phase transitions; Strongly correlated fermions; High-temperature superconductivity; Monte Carlo simulations.; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Thermal fluctuations and disorder strongly influence the behaviour of hightemperature superconductors. In particular the vortices play a key role in determining their properties. In this thesis the main focus lies on phase transitions, both in ultra-thin films and in three-dimensional systems, which are driven by vortex fluctuations. LÄS MER

  4. 8. Silicon Carbide High Temperature Photodetectors and Image Sensor

    Författare :Shuoben Hou; Mikael Östling; Carl-Mikael Zetterling; Per-Erik Hellström; Anthony O'Neill; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Silicon Carbide SiC ; high temperature; photodetector; photodiode; phototransistor; ultraviolet UV ; transistor-transistor logic TTL ; bipolar junction transistor BJT ; integrated circuit IC ; pixel sensor; image sensor; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : Silicon Carbide (SiC) has the advantages of ultraviolet (UV) sensing and high temperature characteristics because of its wide band gap. Both merits make SiC photodetectors very attractive in astronomy, oil drilling, combustion detection, biology and medical applications. LÄS MER

  5. 9. Silicon Carbide BipolarTechnology for High Temperature Integrated Circuits

    Författare :Luigia Lanni; Zetterling Carl-Mikael; Sei-Hyung Ryu; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide SiC ; bipolar junction transistor BJT ; current gain; surface passivation; SiC etching; complementary bipolar; lateral PNP; Darlington transistors; SPICE modeling; high-temperature; integrated circuits; emitter coupled logic ECL ;

    Sammanfattning : The availability of integrated circuits (ICs) capable of 500 or 600° C operation can be extremely beneficial for many important applications, such as transportation and energy sector industry. It can in fact enable the realization of improved sensing and control of turbine engine combustion leading to better fuel efficiency and reduced pollution. LÄS MER

  7. 10. High-Temperature Radio Circuits in Silicon Carbide Bipolar Technology

    Författare :Muhammad Waqar Hussain; Ana Rusu; Florin Udrea; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 4H-SiC; active down-conversion mixer; BJT; EM simulations; silicon carbide; high-temperature; IF amplifier; LTCC; negative resistance oscillator; passives; RF circuits; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : High-temperature electronics find many niche applications in downhole drilling, aviation, automotive and future exploration of inner planets like Venus and Mercury. Past studies have shown the potential of silicon carbide (SiC) electronics for catering these extreme temperature applications. LÄS MER